Resophone for telegraph instruments.



(Appumion med .nm 2e, 1901.)

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Nrrnn STATES FRA-Nelis w../1NDEN, `or MDULU'ri-I, iumnirsOTA.l

PATENT OFFICE.

.RESQPHONE FOR TELEGRAPH INSTRUMENTS.

SPECIFICATION, forming part of Letters Patent No, 687,234, aatea'Novemberae, 1901.. l Application filed January 26, 1901( Serial No. 44,801. (No modem' I j To @ZZ 107mm it may Concern.'

-Be it known that I, FRANCIS \V. INDEN, a citizen of the United States, residing at D uluth, in the 'county of'St. Louis and State of Minnesota, have invent-ed new and-useful Improvements in Resog zones for Telegraph Instruments, of vwhich the following is a speciication;

My invention relates to what I style a resophone for use in connection with telegraph instruments. for inclosing the telegraphsounder and projecting the'sound therefrom on predetermined lines or within limited zones.

With telegraph instruments as now'used it is customaryr to expose the sounder, so that the sound is emitted equally7 therefrom in all directions, and this has been found undesirable where secret messages are sent, in telegraph-offices, where numerous instruments are employed, railroad-stations,where foreign sounds interfere with the receiving of trainorders that require extreme accuracy, in public places, such as the floor of aboard of trade, where it is desirable that the messages delivered by the telegraph-sounder be distinctly heardonly by the receiving-operator, in newspaper-offices, where the clicking of instru-v ments annoys persons who work within range of the sound emitted by the instrument, and under many other varying conditions where it is desirable to confine the sound ofthe instrument to a limited space.

To-these endsmy invention consists of a sound-mufiiing inclosure wherein the telegraph-sounder is located and whichfis perforated to emit the sound from the instrument.

' In the accompanying drawings, forming part of this specification, Figure 1 is a front elevation of the resophone, shown with its lid open, so as to expose the telegraph-sounder to view, and partly broken away to show the slot in which the lid works. elevation of the resophone, partly broken away to expose the instrument and shown attached beneath a counter, which is provided with a working table below the instrument; and Fig. 3 is a similar view to Fig. 2, show- 'ing the resophone supported by the standard on a swinging arm.

Its object is to provide means Fig. 2 is a sidev In the drawings, let A representthe telegraph-sounder, :B the sounding-box, and() the trumpet for projecting the sound emitted by the sounder from the box. l

The telegraph-sounder is'placed inside the box and, as shown, is fastened vby the screws 2 to the lower side'B. The front side 4 of the box is movable, so that it constitutes a lid or closure, which when open laffords'ready access to the sounder. This lid has flanges 5,

which mortise into the grooves 6 of the boxto slide. It is obvious, however, that the lid may be pivoted or hinged to the frame or the box otherwise constructed to enable ready access to the sounder without departing from the principles which I have applied.

As shown, the lid of the box is perforated at 7, to emit the sound from the instrument.

This perforation is positioned` 'directly oppo site where the sounding-lever S when operating strikes the frame 9 and produces the click, so as to be in direct range of the sound thus emitted. The trumpet or sound-magnifier C vis secured with its inner 'and cpntracted end over the perforation ofthe lid by screws 11, which pass through its ange l2. The trumpet may project through the lid into the box, if desired, or the box or lid may be, formed with a suitable opening for projecting the sound Without the use of a trumpet, as shown in the drawings. y

The materials used in the construction of the box and trumpet may be metal, wood, or any other substance suitable for inclosing the sounder and projecting the sound therefrom to the ear of the receiving voperator and for muf'ling the sound in other directions.

The electric' conducting-wires for energizing the sounder, as shown, are incased in the cable 13, 'passing through the bushing 14 in the box'to the sounder. .Thiscable is dexible, so that the instrument may turn or swing to any desired position without breaking or disconnecting the wires from the instrument.

The box is pivoted to the under side ofthe ycounter 15 by the screw 16., which passes in Fig. 2.) By this method of fastening the resoph'o'ne'mayA be turned on thev pivot to emit the sound in any desired direction to suitthe'conveuience of the receiving operator. The front 2O of the counter carries the Working table 21 below the instrument:

Asshown in Fig. 3, the box B is pivoted at 22 to the free end of the swinging arm 23,l

which is journaled on thelupper end of the vertical rod or standard 24., In this construction the apparatus may be portable or thel standard maybe mounted' on the table 25 by screws 26.- The swinging arm permits the trumpet to be projected in any desired direc-` resophone to be turned to vany desired positionin a horizontal plane. It is obvious the swinging larm may be vertically adjustable onthe standard. i For menyusesv this con-v struction is important,l as it enables the tionl and 'which at the same time permits lateral',forWalrd, rearward, or vertical .adjustment of the boX. It' is obvious that the size,

shape, and dimensions of the different parts lmay be varied at will and also that the resophone may be attached to a telegraph-receiver `in' any position.

Having described my invention, what I Patent, isl l. TheA combination with. the telegraphsounder of a sound-muiiiing boX inclosing the v claim as new, and desire to protect byLetters l same, a cover lfor opening and closing said l box, a soundingtrumpet opening through and projecting from said cover, and a pivoted arm Aon the free end of which said box is pivotally mounted.

2. The combination with the telegraph.- sounder, of a box inclosing the same, said box having a movable side, and a trumpet secured to'said side and opening from said box. 3. The combination with the telegraphsounder, of a box inclosing the same,a sliding side for opening and closing said box andthe trumpet opening through and projecting from said side. Y

In testimony whereof Ihavesigned my name to this specification in the presence of two subscribing'witnesses. v

FRANCIS W. INDEN. Witnesses: y

WM. W. BRADBURY, CALVIN F. I-IoW. 

